ViewSonic VS11618 Service Manual page 19

and program operations. The devices can be programmed in standard EPROM
programmers as well.
Pin Diagram:
PIN Descriptions:
Symbol
CE#
SO
WP#
GND
Vcc
HOLD#
SCK
SI
Circuit Diagram
ViewSonic Corporation
Type
INPUT Chip Enable: CE# goes low activates the device's internal
circuitries for device operation. CE# goes high deselects the
device and switches into standby mode to reduce the power
consumption. When the device is not selected, data will not
be accepted via the serial input pin (SI), and the serial
output pin (SO) will remain in a high impedance state.
OUTPUT Serial Data Output
INPUT Write Protect A hardware program/erase protection for all or
partial of memory array. When the WP# pin is pulled t low,
whole or partial of memory array is write protected depends
on the setting of BP2, BP1 and BP0 bits in the Status
Register, When the WP# is pulled high, the devices are not
write protected.
Ground
Device Power Supply
INPUT Hold: Pause serial communication with the master device
without resetting the serial sequence.
INPUT Serial Data Clock
INPUT Serial Data Input
Description
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